Installation manual
o
o
Power
Sequence
and
Control"
.'
gof~rr;la~~it
------(,'
Position)
Control
Unit-to-Channel
Cabling
Generally,
the
maximum
cumulative
cable
length
to
attach
to
a
channel
is
122
meters
(400 feet).
Exceptions
to
this
are
noted
on
the
cabling
schematics
for
the
individual
control
units.
All
control
units
are
serially
connected
to
the
channels.
I
-?l
Channel
1 J
I
Channel
2
J
~
F-
...............
..
_-
.......
~
~~
..
....
----
-
~
-'-
....
_--
-_
...
-_
..
-
"
.'
~
I/O
Interface
Cables
Control
'---
Unit
No.1
~
Control
Unit
No.2
(with
Two-Channel
Capability)
~,
Control
Unit
NO.3
To
Additional
Control
Units
(Max
8)
,*,-
"-
......
-
.....
_-
Control
Unit
-
No.1
t
Control
Unit
No.3
1
)
~
Figure
5-4.
Control
Unit-to-Channel
Cabling
*
Power
sequencing
is
an
option
on
most
IBM
equipment.
Power
sequence
and
control
cables
need
not
be
ordered
unless
you
want
to
power
the
equipment
on
or
off
from
a
single
location,
or
the
individual
machine
requires
it
for
other
reasons.
See
the
specification
pages
for
the
specific
control
unit
requirement.
-
.......
_-
.....
Power
'....
Sequence
.
.r-----
and
-------
.'
Control"
5-9